An SRV record, which means Service record, is a DNS entry that is used to define the servers which run a certain service for a domain. Put simply, you are able to use your domain not only for a site, but also for an instant messaging server, a video streaming host or a Voice-Over-IP server, for instance, while you still have an Internet site with it. If you set up the SRV record, you can choose what Internet Protocol it will employ, on which port the connection to the particular server is going to be established as well as the priority and the weight of the record in case that you have a number of SRV records for the exact same service. The latter option will allow you to use different machines for load balancing and redundancy. With this kind of DNS records, you can use the same domain name for a number of purposes and even with different companies in case the same one cannot provide all services you require.